The lithotripsy table height: a novel predictor of outcome in shockwave lithotripsy
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | International Braz J Urol (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382011000300009 |
Resumo: | BACKGROUND: Outcome of Extracorporeal Shockwave Lithotripsy (SWL) is determined by physical factors that affect stone fragmentation and clearance. PURPOSE: To evaluate the predictive value of the Lithotripsy Table Height (LTH) in SWL outcome. Lithotripsy Table Height (LTH) is a variable that represents skin to therapy head distance, and it is proportional to the energy that reaches the stone. MATERIALS AND METHODS: A prospective study enrolled patients undergoing SWL for radiopaque urinary stones. All procedures were performed using a Modulith SLX (Karl Storz, Germany) Lithotripter. Patient weight, height and age; stone location and size; number of shock waves delivered, and LTH were recorded. One month post-procedure a KUB was obtained. Logistic regression analysis was used to evaluate the effects of these variables on stone-free outcome. A ROC curve was plotted. RESULTS: Fifty-six patients were enrolled. After one month follow-up, overall success rate (Stone Free) was 83.9% (n = 47). LTH was the only independent predictor of outcome in both univariate and multivariate analysis (p = 0.029). Stone size (p = 0.45) and BMI (p = 0.32) were not significant. In the ROC curve, LTH showed an Area under the Curve = 0.791. Patients with LTH < 218 (n = 8) had relative risk of residual stones = 7.5, odds Ratio: 6.6 (Stone free rate 37.5% vs. 91.5%). CONCLUSION: LTH appears to be an independent predictor of SWL outcome. High success rates can be expected if LTH > 218. Patients with lower LTH had a less effective therapy, therefore, worse stone fragmentation and clearance. These findings may help improve patient selection for SWL therapy. |
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The lithotripsy table height: a novel predictor of outcome in shockwave lithotripsyextracorporeal shockwave lithotripsyhigh-energy shock wavestreatment outcomecalculiBACKGROUND: Outcome of Extracorporeal Shockwave Lithotripsy (SWL) is determined by physical factors that affect stone fragmentation and clearance. PURPOSE: To evaluate the predictive value of the Lithotripsy Table Height (LTH) in SWL outcome. Lithotripsy Table Height (LTH) is a variable that represents skin to therapy head distance, and it is proportional to the energy that reaches the stone. MATERIALS AND METHODS: A prospective study enrolled patients undergoing SWL for radiopaque urinary stones. All procedures were performed using a Modulith SLX (Karl Storz, Germany) Lithotripter. Patient weight, height and age; stone location and size; number of shock waves delivered, and LTH were recorded. One month post-procedure a KUB was obtained. Logistic regression analysis was used to evaluate the effects of these variables on stone-free outcome. A ROC curve was plotted. RESULTS: Fifty-six patients were enrolled. After one month follow-up, overall success rate (Stone Free) was 83.9% (n = 47). LTH was the only independent predictor of outcome in both univariate and multivariate analysis (p = 0.029). Stone size (p = 0.45) and BMI (p = 0.32) were not significant. In the ROC curve, LTH showed an Area under the Curve = 0.791. Patients with LTH < 218 (n = 8) had relative risk of residual stones = 7.5, odds Ratio: 6.6 (Stone free rate 37.5% vs. 91.5%). CONCLUSION: LTH appears to be an independent predictor of SWL outcome. High success rates can be expected if LTH > 218. Patients with lower LTH had a less effective therapy, therefore, worse stone fragmentation and clearance. These findings may help improve patient selection for SWL therapy.Sociedade Brasileira de Urologia2011-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382011000300009International braz j urol v.37 n.3 2011reponame:International Braz J Urol (Online)instname:Sociedade Brasileira de Urologia (SBU)instacron:SBU10.1590/S1677-55382011000300009info:eu-repo/semantics/openAccessEnrique Ossandon,Recabal,PedroAcevedo,CristianFlores,Jose MiguelMarchant,Fernandoeng2011-07-27T00:00:00Zoai:scielo:S1677-55382011000300009Revistahttp://www.brazjurol.com.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||brazjurol@brazjurol.com.br1677-61191677-5538opendoar:2011-07-27T00:00International Braz J Urol (Online) - Sociedade Brasileira de Urologia (SBU)false |
dc.title.none.fl_str_mv |
The lithotripsy table height: a novel predictor of outcome in shockwave lithotripsy |
title |
The lithotripsy table height: a novel predictor of outcome in shockwave lithotripsy |
spellingShingle |
The lithotripsy table height: a novel predictor of outcome in shockwave lithotripsy Enrique Ossandon, extracorporeal shockwave lithotripsy high-energy shock waves treatment outcome calculi |
title_short |
The lithotripsy table height: a novel predictor of outcome in shockwave lithotripsy |
title_full |
The lithotripsy table height: a novel predictor of outcome in shockwave lithotripsy |
title_fullStr |
The lithotripsy table height: a novel predictor of outcome in shockwave lithotripsy |
title_full_unstemmed |
The lithotripsy table height: a novel predictor of outcome in shockwave lithotripsy |
title_sort |
The lithotripsy table height: a novel predictor of outcome in shockwave lithotripsy |
author |
Enrique Ossandon, |
author_facet |
Enrique Ossandon, Recabal,Pedro Acevedo,Cristian Flores,Jose Miguel Marchant,Fernando |
author_role |
author |
author2 |
Recabal,Pedro Acevedo,Cristian Flores,Jose Miguel Marchant,Fernando |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Enrique Ossandon, Recabal,Pedro Acevedo,Cristian Flores,Jose Miguel Marchant,Fernando |
dc.subject.por.fl_str_mv |
extracorporeal shockwave lithotripsy high-energy shock waves treatment outcome calculi |
topic |
extracorporeal shockwave lithotripsy high-energy shock waves treatment outcome calculi |
description |
BACKGROUND: Outcome of Extracorporeal Shockwave Lithotripsy (SWL) is determined by physical factors that affect stone fragmentation and clearance. PURPOSE: To evaluate the predictive value of the Lithotripsy Table Height (LTH) in SWL outcome. Lithotripsy Table Height (LTH) is a variable that represents skin to therapy head distance, and it is proportional to the energy that reaches the stone. MATERIALS AND METHODS: A prospective study enrolled patients undergoing SWL for radiopaque urinary stones. All procedures were performed using a Modulith SLX (Karl Storz, Germany) Lithotripter. Patient weight, height and age; stone location and size; number of shock waves delivered, and LTH were recorded. One month post-procedure a KUB was obtained. Logistic regression analysis was used to evaluate the effects of these variables on stone-free outcome. A ROC curve was plotted. RESULTS: Fifty-six patients were enrolled. After one month follow-up, overall success rate (Stone Free) was 83.9% (n = 47). LTH was the only independent predictor of outcome in both univariate and multivariate analysis (p = 0.029). Stone size (p = 0.45) and BMI (p = 0.32) were not significant. In the ROC curve, LTH showed an Area under the Curve = 0.791. Patients with LTH < 218 (n = 8) had relative risk of residual stones = 7.5, odds Ratio: 6.6 (Stone free rate 37.5% vs. 91.5%). CONCLUSION: LTH appears to be an independent predictor of SWL outcome. High success rates can be expected if LTH > 218. Patients with lower LTH had a less effective therapy, therefore, worse stone fragmentation and clearance. These findings may help improve patient selection for SWL therapy. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382011000300009 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382011000300009 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1677-55382011000300009 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Urologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Urologia |
dc.source.none.fl_str_mv |
International braz j urol v.37 n.3 2011 reponame:International Braz J Urol (Online) instname:Sociedade Brasileira de Urologia (SBU) instacron:SBU |
instname_str |
Sociedade Brasileira de Urologia (SBU) |
instacron_str |
SBU |
institution |
SBU |
reponame_str |
International Braz J Urol (Online) |
collection |
International Braz J Urol (Online) |
repository.name.fl_str_mv |
International Braz J Urol (Online) - Sociedade Brasileira de Urologia (SBU) |
repository.mail.fl_str_mv |
||brazjurol@brazjurol.com.br |
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1750318072316559360 |